How to write a simple audio player program in C++?

With the advancement of computer technology, audio players have become an indispensable tool in people's daily lives. In the field of C programming, how to write a simple audio player program? In this article, we will explore this topic.

1. The basic framework of the program

When writing an audio player program, the most important thing is to clarify the basic framework of the program. The framework of a basic audio player program usually includes the following parts:

1. Load audio files
2. Initialize the player
3. Play audio
4. Pause audio
5. Stop the audio
6. Close the player
7. Release resources

2. Load the audio file

First, we need to define a structure, using information for storing audio files. This structure usually includes information such as audio sampling rate, number of channels, bit depth, and audio data.

When the program is running, we need to load the audio file from the path specified by the user and then decode it. Regarding how to decode audio files, we can use various open source libraries, such as ffmpeg, openAL, SDL, etc.

3. Initialize the player

After loading the audio file, we need to initialize the player. This process usually includes operations such as creating an audio device, setting audio device parameters, and initializing the audio callback function.

In C, we can use a series of functions provided by the open source library SDL to complete these operations.

4. Play audio

After initializing the player, we can start playing audio. During the audio playback process, we need to continuously read data from the audio data and then write it to the audio cache.

Once there is enough data in the cache, we can start the audio device and start playing audio.

5. Pause audio

When the user needs to pause the audio, we need to pause the audio device and save the current cache status. This process usually involves saving the current playback position and clearing the cache from the device.

6. Stop audio

When the user needs to stop the audio, we need to close the audio device and release all resources from the memory. This process usually includes operations such as stopping the audio device and releasing the audio data cache and audio device resources.

7. Close the player

Once the audio is stopped and all resources are released, we can close the player.

8. Release resources

When releasing player resources, we need to release all audio data from memory and release all audio device resources and other operations.

Summary:

Through the above steps, we can write a simple audio player program. Of course, if you want to make your program more complete, you can add some other functions, such as adjusting the volume, supporting multiple audio formats, and so on. In any case, writing an audio player program requires you to have solid C programming capabilities and certain audio coding and decoding knowledge. Only through continuous learning and practice can you write a more complete audio player program.

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